I was exploring the forums and then I found URLs with SuperTux on them. They were located below the SuperTux forum types. When I clicked on them, here was my message as an attachment.
However, when I copy the URL and paste it into my browser instead of being redirected, I have no problem.
It looks like the HTTPS on that website is just improperly configured; the certificate hasn't been updated since it expired in 2012. When you copied and pasted the link, the browser probably defaulted to unencrypted HTTP.
Makes sense. But would the urls be able to get fixed? Or maybe not..? When I type in the website name without the HTTPS , no dialog or problem shows up..